It is ready for 30% out of the box. You will not have to replace the connecting rod after break in with the WERKS engines. Its your choice if you want to break it in with 25% but most will agree it is fine to break it in with 30% and its usually best to break it in with the fuel you are planning to run. So if you plan to run 30%, break it in with 30%. BUt that is all user preference.


Make sure the lower O-ring is fully seated in the case. Put a small amount of oil on the oring to help when seating the carb base past that o-ring. The upper o-ring on the carb is optional if you want to use it or not. SOme people remove it and some people leave it on. The lower seal is enough to properly seal the carb, so its up to you. If you do leave the upper O-RIng on the carb it will provide a secondary seal between the carb and case. Ther ewill also be a small gap becasue of the oring being between. Thats normal.

Insert the carb and push down and twist the carb to seat it past the lower O-Ring. It will take a bit of force to push it down. The pinch bolt is what holds the carb in place. Insert one end on one side and the other end on the other side of the hole on the case making sure the cutout for the carb is in the correct position and orientation. Puta small amount on lube on the oring to ensure they slide into the case smoothly without tearing. Its good the apply a small amount of thread lock to the bolt to insure during use the carb does not move. Make sure you carb is in the right position then tighten. It needs to hold the carb but do not overtightn as it can damage the insulating sleeve on the carburetor.


Any thing else just ask There is a lot of good info on this thread and a lot of good guys on here

You are gonna love the B5